Music-leaf turner.



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No 863,740. PATENTED AUG. 20, 1907.

J. H. MOISAN.

MUSIC LEAF TURNER. APPLICATION FILED DEC. 10. 1906.

No. 863,740. PATENTED AUG. 20, 1907. J. H. MOISAN.

MUSIC LEAF TURNER.

urmourox FILED DEO.10,1906.

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UNITED STATES PATENT OFFICE.

JOSEPH H. MOISAN, OF CHICAGO, ILLINOIS.

MUSIC-LEAF TURNER.

Specification of Letters Patent.

Patented Aug. 20, 1907.

Application filed December 10, 1906. Serial No. 347,130.

an improved form of music-leaf turning device which will through a simple movement turn the leaves of a folio of music one at a time and which will automatically return to position for turning the'next succeeding leaf after each leaf is turned; to provide an improved method of mounting the leaf engaging arms of amusicleaf turner so as to reduce the friction between the arms.

and prevent the possibility of more than one arm turning at a time; and to provide means for readily re-setting the device to repeat its operations after all of its leaf-turning arms have turned their respective leaves of the music. These objects are accomplished by the device shown in the accompanying drawings, in which:

Figure 1 is a front elevation of a music-leaf turning device constructed according to this invention. showing the same in its relation to afolio of music, the leafturniug arms and the folio of themusic being partly broken away to suit the scale of the drawing. Fig. 2 is a top plan of the same with all but one of the leafturning arms removed. Fig. 3 is a bottom plan of the same. Fig. 4 is a side elevation. showing an outside elevation of the feed dogs. Fig. 6 is a detail showing an inside elevation of the same. Fig. 7 is a detail of the lower pintle upon which the leaf-turning arms are pivotally mounted. Fig. 8 is a detail showing the method of guiding the outer end of the lever 12 between the track 13 and the base plate 1, the track and base plate being shown in section and the parts being partly broken away.

In the construction shown in the drawings, the base-' 1 is provided with spring clips 2 on its under face for fastening it to a projecting supporting ledge of a music rack. An upright 3 is fastened at the rear of the base 1 and supports a pintle 4 in axial alinement with a second pintle 5 on the base. The pintle 5 is of stepped formation comprising a series of sections each larger in diameter than the next above, as shown in Fig. 7, and each step forming a shoulder for supporting a leafturning arm 6 which is journaled on the section next above. Each of the leaf-turning arms 6 consists of a flat blade forked at its inner end and having its forked portions twisted to lie at right angles to the main part of the arm and being spaced apart so as to engage both I pintles 4 and 5. Each of the upper arms has an oblong bearing as at 7 in Fig. 2, and each of the lower arms has a circular bearing loosely fitting the corresponding section of the pintle 5. As each of the sections of the pintle 5 is sli htly longer than the thickness of the-lower Fig. 5 is a detail fork. of its respective arm 6, said arms are separately supported onseparate shoulders of the pintle 5 so as to move freely without friction between each other. The double pintle arrangement gives a wide bearing for the arms and permits of removing the uppermost arm without removing all of the other arms.

Each of the arms 6 has secured at its outer end an upwardly disposed wire 8 having a clip 9 at its upper end for gripping one of the leaves of the folio. The

upper end 10 of the pintle 5 is screwthreaded and provided with lock-nuts 11 which prevent the accidental disengagement of the'arms with their pivots.

A feed lever 12 is pivoted on the pintle 5 adjacent to the base plate 1 and its outer end is guided between the base plate 1 and the track 13 which is concentric with the pivot 5 but spaced slightly above the base. Thelever 12has'a stud 14 which extends through an annular slot 15 in the'base and engages a slot 16 in the operating lever 17. The operatinglever is pivoted at 18 in front of the pivot 5 and is normally urged to its initial position, shown in Figs. 1 to 3, by means of a spiral spring 19. The cam action between the pin 14 and slot 16 causes the lever 12 to move at a considerably greater speed than the operating lever 17 so that a comparatively short movement of the lever 17 causes the lever 12 to swing its entire range. The outer end 1 of the lever 12 is guided between the base 1 and track 13. The lever 12 has an upright portion 20 near its outer end upon which are pivotally mounted feed dogs 21 and 22. Each of thearms 6 is provided with a rearwardly extending lug 23 which spaces the arms 6 apart, when in their initial position, so as to provide for proper action of the feed dogs as will hereinafter appear. The feed dog 22 is provided with a roller 24 which rides uponthe track 13 and controls the position of the opposite end of the dog 22. When the lever 12 is at the right hand end of its stroke, as in Fig. 2, then the dog 22 is in position for engaging. the front face of the foremost arm 6, as in Fig. 5. The dog 21 then engages the same arm as in Fig. 5. The upward movement of the dog 21 is limited by a stop lug 25 which engages the edge of the upright 20. Both dogs are normally urged upward by means of the spring 26.

When the dogs are in the position shown in Fig. 5, movement of the operating arm 17 toward the left causes the lever 12 to swingtoward the left, the dog 21 carrying the foremost arm 6 with the lever 12 and thereby turning a leaf of the music. As the roller 24 strikes the upwardly inclined portion 27 of the track 13, the dog 22 is withdrawn from engagement with the arm 6. This permits the feed lever 12 to return to its initial position under the action of the spring 19 without carrying back the leaf which has been turned. The dog 21 then springs behind the next succeeding armand is prevented from engaging more than one arm by means of the dog 22 as hereinbefore described. A

arms and permitting the arms stop pin 28 limits the movement toward the right of the last arm 6.

A lever 30 is fulcrumed at 31 upon a-lug on the base plate and carries at its inner end a plate 32 which is pivotally mounted on the lever 30 and is adapted to engage all of the arms 6 and tilt them upward so as to permit the dogs 21 to pass clear of them when it is desired to return the arms 6 to their initial position for repeating the operation of turning the leaves in succession. This is done by returning all of the arms 6 to their initial position, then depressing the lever 30 with one finger and shifting the operating lever 17 with another and then releasing the lever 30. When the lever 17 is now released, the feed dogs spring into position for engaging the foremost of the arms 6 ready to repeat operations.

The main features of the operation of the device shown will be readily understood from the foregoing description. The leaf-turning arms are each attached to separate leaves of the folio and are then all turned to their right-hand position. The forward end of the lever 30 is then depressed and the feeding mechanism thrown to the left by moving the lever 17. When the lever 17 is released, after releasing the lever 30, the feed dogs move into position for engaging the foremost of the arms 6, which arms may then be successively turned toward the left by swinging the arm 17 and without further attention on the part of the operator. To remove one of the arms 6, it is merely necessary to unscrew the lock-nuts ll and lift the uppermost arm from the pintles.

What I claim as my invention and desire to secure by Letters Patent is:

1. In a music-leaf turner, the combination of a plurality of leaf turning arms, a pintle for pivotally supporting said arms, said pintle being of stepped formation and comprising a series of sections each of larger diameter than the section next above, each of said arms having a bearing loosely fitting its respective portion of said pintle, and all being arranged to permit said arms to swing on the pintle without friction between each other.

2. In a music-leaf turner, the combination of a frame having thereon a pair of pintles spaced apart and located in axial alinement with each other, and a plurality of leaf-turning arms, each comprising a flat blade forked at its inner end and having the forked portions spaced apart so as to respectively engage said pintles, each of said portions being twisted so as to lie in a plane substantially at right angles to said blade and having therein an aperture for engaging-its respective pintle.

3. In a music-leaf turner, the combination of a frame having thereon a pair of pintles spaced apart and located in axial alinement with each other, and a plurality of leafturning arms each having at its inner end a pair of bearings spaced apart to respectively engage said pintles, one of said pintles being of stepped formation and comprising a series of sections each larger in diameter than the section next above and each loosely fitting the corresponding bearing of its respective arm, said sections being of greater length than the bearings of their respective arms so as to provide shoulders for separately supporting said to swing without friction between each other.

4. In a music-leaf turning device, the combination of a plurality of leaf-turning arms mounted to swing on a vertically disposed axis, an operating lever pivotally mounted to swing in a plane parallel with the plane of movement of said leaf-turning arms, feed dogs mounted on said lever and adapted to engage said leaf-turning arms one at a time for swinging them to the opposite side of their pivotal axis, means for withdrawing said dogs to release said arms when swung to said opposite side of their axis, and

means for shifting all of said arms when in their initial position to permit said dogs to pass clear of the arms.

5. In a music-leaf turner, the combination of a frame having thereon a pair of vertically disposed pintles located in axial alinement with each other, a plurality of leafturning arms having separate bearings at their inner ends for engaging each of said pintles, a reciprocating feeding device adapted to engage said arms one at a time for swinging the same from one side of their axis to the other, one of the bearings on each of said arms being of oblong form so as to permit said arms to be tilted on their pintles and means for simultaneously tilting all of said arms so as to shift them clear of the feeding device, substantially as described 6. A music-leaf turner comprising a plurality of leafturning arms pivotally mounted on a vertically disposed axis, a feeding lever pivotally mounted to move in a plane parallel to the plane of movement of said arms and having thereon feed dogs adapted to engage said leaf-turning arms one at a time for swinging them on their axis, and an operating lever pivotally mounted on an axis at one side of the axis of said feed lever and having slot and pin connection with said feed lever, the arms of said levers being so proportioned that the movement of said operating lever will cause a relatively faster movement of said feed lever.

7. A music-leaf turner comprising a plurality of leafturning arms pivotally mounted on a vertically disposed axis, a feeding lever pivotally mounted to move in a plane parallel to the plane of movement of said arms and having thereon feed dogs adapted to engage said leafturning arms one at a time for swinging them on their axis, an operating lever pivotally mounted on an axis at one side of the axis of said feed lever and having slot and pin connection with said feed lever, the arms of said levers being so proportioned that the movement of said operating lever will cause a relatively faster movement of said feed lever, and a spring normally urging said feed lever toward one limit of its movement.

8. In a music-leaf turning device, the combination of a plurality of leaf-turning arms mounted to swing about a common axis for turning the leaves of a book and provided with shoulders adapted to space them apart when in their initial position, a feed lever mounted to oscillate in a plane substantially parallel with the plane of movement of said arms, a feed dog yieldingly mounted on said feed lever and adapted to pass behind the leaf-turning arm which is at the front on one side of the axis, a second dog movably mounted on said lever and adapted to engage said front arm to prevent said first dog from passing into engagement with the next succeeding arm, a track extending along the path of said second feed dog, said second feed dog having a part riding on said track and said track being formed so as to withdraw said dog from engagement with the leaf-turning arm when said arm arrives at a position at the opposite side of its axis from its initial position.

9. In a music-leaf turning device, the combination of a base plate, a plurality of leaf-turning arms pivotally mounted on an axis disposed substantially at right angles to said base plate, a feed lever pivotally mounted on said base in axial alinement with said arms, a curved track arranged concentrically of the axis of said arms and spaced away from the base so as to provide a channel for guiding the outer end of said feed lever, a pair of feed dogs mounted on said feed lever and respectively adapted to engage opposite faces of the foremost of said leaf-turning arms on one side of the axis, the front dog having a part riding on said track, and said track being formed to withdraw said front dog from engagement with the arm when said arm has swung toward the other side of the pivotal axis.

10. In a music-leaf turning device, the combination of a plurality of leafturning arms mounted to swing about a common axis for turning the leaves of a book and provided with shoulders adapted to space them apart when in their initial position, a feed lever mounted to oscillate in a plane substantially parallel with the plane of movement of said arms, a feed dog yieldingly mounted on said feed lever and adapted to pass behind the leaf-turning arm which is at the front on one side of the axis, a second dog movably mounted on said lever and adapted to engage said front arm to prevent said first dog from passing into engagement with the next succeeding arm, a track on said base adapted to engage said second feed dog and withdraw said dog from engagement with the leaf-turning arm when said arm arrives at a position at the opposite side of its axis from its initial position.

11. A music-leaf turner comprising a plurality of leafturning arms pivotally mounted on a vertically disposed axis, a feeding lever pivotally mounted to move in a plane parallel to the plane of movement of said arms and having thereon feed dogs adapted to engage said leaf-turning arms one at a time for swinging them on their axis, and an operating lever pivotally mounted on an axis at one side of the axis of said feed lever and having connection with said feed lever whereby the movement of said operating lever will cause a relatively faster movement of said feed lever.

Signed at Chicago, this 6th day of December, 1906.

JOSEPH H. MOISAN Witnesses:

WM. R. RUMMLER, E. A. RUMMLER. 

